The point at which a child becomes an adolescent is defined by the onset of puberty or by the beginning of the teenage stage. Adolescence is also viewed as ending with the teenage stage. However, in some individuals (particularly females), puberty begins in the preadolescence years.
Population of Grundy County. Last official estimated population of Grundy County was 50,098 (year 2014)[1]. This was 0.016% of total US population and 0.4% of total Illinois state population. Area of Grundy County is 430.4 miÂ² (=1114.9 kmÂ²), in this year population density was 116.39 p/miÂ². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Grundy County population in 2017 would be 50,124 .
Welcome. Thank you for your interest in Grundy County! Established in 1841, Grundy County is situated just 80 miles southwest of Chicago. along Interstates 80 and 55. More than 50,000 people call Grundy County âhomeâ. Grundy County measures approximately 430 square miles and is one of Illinoisâ most important, commercial and agricultural counties. The Illinois River along with other streams gives Grundy County about 45 miles of waterways.